]>
Commit | Line | Data |
---|---|---|
749cf76c CD |
1 | /* |
2 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
3 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License, version 2, as | |
7 | * published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
17 | */ | |
18 | ||
1fcf7ce0 | 19 | #include <linux/cpu_pm.h> |
749cf76c CD |
20 | #include <linux/errno.h> |
21 | #include <linux/err.h> | |
22 | #include <linux/kvm_host.h> | |
1085fdc6 | 23 | #include <linux/list.h> |
749cf76c CD |
24 | #include <linux/module.h> |
25 | #include <linux/vmalloc.h> | |
26 | #include <linux/fs.h> | |
27 | #include <linux/mman.h> | |
28 | #include <linux/sched.h> | |
86ce8535 | 29 | #include <linux/kvm.h> |
749cf76c | 30 | #include <trace/events/kvm.h> |
b02386eb | 31 | #include <kvm/arm_pmu.h> |
749cf76c CD |
32 | |
33 | #define CREATE_TRACE_POINTS | |
34 | #include "trace.h" | |
35 | ||
7c0f6ba6 | 36 | #include <linux/uaccess.h> |
749cf76c CD |
37 | #include <asm/ptrace.h> |
38 | #include <asm/mman.h> | |
342cd0ab | 39 | #include <asm/tlbflush.h> |
5b3e5e5b | 40 | #include <asm/cacheflush.h> |
342cd0ab CD |
41 | #include <asm/virt.h> |
42 | #include <asm/kvm_arm.h> | |
43 | #include <asm/kvm_asm.h> | |
44 | #include <asm/kvm_mmu.h> | |
f7ed45be | 45 | #include <asm/kvm_emulate.h> |
5b3e5e5b | 46 | #include <asm/kvm_coproc.h> |
aa024c2f | 47 | #include <asm/kvm_psci.h> |
910917bb | 48 | #include <asm/sections.h> |
749cf76c CD |
49 | |
50 | #ifdef REQUIRES_VIRT | |
51 | __asm__(".arch_extension virt"); | |
52 | #endif | |
53 | ||
342cd0ab | 54 | static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); |
3de50da6 | 55 | static kvm_cpu_context_t __percpu *kvm_host_cpu_state; |
342cd0ab CD |
56 | static unsigned long hyp_default_vectors; |
57 | ||
1638a12d MZ |
58 | /* Per-CPU variable containing the currently running vcpu. */ |
59 | static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu); | |
60 | ||
f7ed45be CD |
61 | /* The VMID used in the VTTBR */ |
62 | static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1); | |
20475f78 VM |
63 | static u32 kvm_next_vmid; |
64 | static unsigned int kvm_vmid_bits __read_mostly; | |
f7ed45be | 65 | static DEFINE_SPINLOCK(kvm_vmid_lock); |
342cd0ab | 66 | |
c7da6fa4 PF |
67 | static bool vgic_present; |
68 | ||
67f69197 AT |
69 | static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled); |
70 | ||
1638a12d MZ |
71 | static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu) |
72 | { | |
73 | BUG_ON(preemptible()); | |
1436c1aa | 74 | __this_cpu_write(kvm_arm_running_vcpu, vcpu); |
1638a12d MZ |
75 | } |
76 | ||
77 | /** | |
78 | * kvm_arm_get_running_vcpu - get the vcpu running on the current CPU. | |
79 | * Must be called from non-preemptible context | |
80 | */ | |
81 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void) | |
82 | { | |
83 | BUG_ON(preemptible()); | |
1436c1aa | 84 | return __this_cpu_read(kvm_arm_running_vcpu); |
1638a12d MZ |
85 | } |
86 | ||
87 | /** | |
88 | * kvm_arm_get_running_vcpus - get the per-CPU array of currently running vcpus. | |
89 | */ | |
4000be42 | 90 | struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void) |
1638a12d MZ |
91 | { |
92 | return &kvm_arm_running_vcpu; | |
93 | } | |
94 | ||
749cf76c CD |
95 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
96 | { | |
97 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; | |
98 | } | |
99 | ||
749cf76c CD |
100 | int kvm_arch_hardware_setup(void) |
101 | { | |
102 | return 0; | |
103 | } | |
104 | ||
749cf76c CD |
105 | void kvm_arch_check_processor_compat(void *rtn) |
106 | { | |
107 | *(int *)rtn = 0; | |
108 | } | |
109 | ||
749cf76c | 110 | |
d5d8184d CD |
111 | /** |
112 | * kvm_arch_init_vm - initializes a VM data structure | |
113 | * @kvm: pointer to the KVM struct | |
114 | */ | |
749cf76c CD |
115 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
116 | { | |
94d0e598 | 117 | int ret, cpu; |
d5d8184d | 118 | |
749cf76c CD |
119 | if (type) |
120 | return -EINVAL; | |
121 | ||
94d0e598 MZ |
122 | kvm->arch.last_vcpu_ran = alloc_percpu(typeof(*kvm->arch.last_vcpu_ran)); |
123 | if (!kvm->arch.last_vcpu_ran) | |
124 | return -ENOMEM; | |
125 | ||
126 | for_each_possible_cpu(cpu) | |
127 | *per_cpu_ptr(kvm->arch.last_vcpu_ran, cpu) = -1; | |
128 | ||
d5d8184d CD |
129 | ret = kvm_alloc_stage2_pgd(kvm); |
130 | if (ret) | |
131 | goto out_fail_alloc; | |
132 | ||
c8dddecd | 133 | ret = create_hyp_mappings(kvm, kvm + 1, PAGE_HYP); |
d5d8184d CD |
134 | if (ret) |
135 | goto out_free_stage2_pgd; | |
136 | ||
6c3d63c9 | 137 | kvm_vgic_early_init(kvm); |
a1a64387 CD |
138 | kvm_timer_init(kvm); |
139 | ||
d5d8184d CD |
140 | /* Mark the initial VMID generation invalid */ |
141 | kvm->arch.vmid_gen = 0; | |
142 | ||
3caa2d8c | 143 | /* The maximum number of VCPUs is limited by the host's GIC model */ |
c7da6fa4 PF |
144 | kvm->arch.max_vcpus = vgic_present ? |
145 | kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS; | |
3caa2d8c | 146 | |
d5d8184d CD |
147 | return ret; |
148 | out_free_stage2_pgd: | |
149 | kvm_free_stage2_pgd(kvm); | |
150 | out_fail_alloc: | |
94d0e598 MZ |
151 | free_percpu(kvm->arch.last_vcpu_ran); |
152 | kvm->arch.last_vcpu_ran = NULL; | |
d5d8184d | 153 | return ret; |
749cf76c CD |
154 | } |
155 | ||
235539b4 LC |
156 | bool kvm_arch_has_vcpu_debugfs(void) |
157 | { | |
158 | return false; | |
159 | } | |
160 | ||
161 | int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) | |
162 | { | |
163 | return 0; | |
164 | } | |
165 | ||
749cf76c CD |
166 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
167 | { | |
168 | return VM_FAULT_SIGBUS; | |
169 | } | |
170 | ||
749cf76c | 171 | |
d5d8184d CD |
172 | /** |
173 | * kvm_arch_destroy_vm - destroy the VM data structure | |
174 | * @kvm: pointer to the KVM struct | |
175 | */ | |
749cf76c CD |
176 | void kvm_arch_destroy_vm(struct kvm *kvm) |
177 | { | |
178 | int i; | |
179 | ||
94d0e598 MZ |
180 | free_percpu(kvm->arch.last_vcpu_ran); |
181 | kvm->arch.last_vcpu_ran = NULL; | |
182 | ||
749cf76c CD |
183 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
184 | if (kvm->vcpus[i]) { | |
185 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
186 | kvm->vcpus[i] = NULL; | |
187 | } | |
188 | } | |
c1bfb577 MZ |
189 | |
190 | kvm_vgic_destroy(kvm); | |
749cf76c CD |
191 | } |
192 | ||
784aa3d7 | 193 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
749cf76c CD |
194 | { |
195 | int r; | |
196 | switch (ext) { | |
1a89dd91 | 197 | case KVM_CAP_IRQCHIP: |
c7da6fa4 PF |
198 | r = vgic_present; |
199 | break; | |
d44758c0 | 200 | case KVM_CAP_IOEVENTFD: |
7330672b | 201 | case KVM_CAP_DEVICE_CTRL: |
749cf76c CD |
202 | case KVM_CAP_USER_MEMORY: |
203 | case KVM_CAP_SYNC_MMU: | |
204 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: | |
205 | case KVM_CAP_ONE_REG: | |
aa024c2f | 206 | case KVM_CAP_ARM_PSCI: |
4447a208 | 207 | case KVM_CAP_ARM_PSCI_0_2: |
98047888 | 208 | case KVM_CAP_READONLY_MEM: |
ecccf0cc | 209 | case KVM_CAP_MP_STATE: |
749cf76c CD |
210 | r = 1; |
211 | break; | |
212 | case KVM_CAP_COALESCED_MMIO: | |
213 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
214 | break; | |
3401d546 CD |
215 | case KVM_CAP_ARM_SET_DEVICE_ADDR: |
216 | r = 1; | |
ca46e10f | 217 | break; |
749cf76c CD |
218 | case KVM_CAP_NR_VCPUS: |
219 | r = num_online_cpus(); | |
220 | break; | |
221 | case KVM_CAP_MAX_VCPUS: | |
222 | r = KVM_MAX_VCPUS; | |
223 | break; | |
2988509d VM |
224 | case KVM_CAP_MSI_DEVID: |
225 | if (!kvm) | |
226 | r = -EINVAL; | |
227 | else | |
228 | r = kvm->arch.vgic.msis_require_devid; | |
229 | break; | |
749cf76c | 230 | default: |
b46f01ce | 231 | r = kvm_arch_dev_ioctl_check_extension(kvm, ext); |
749cf76c CD |
232 | break; |
233 | } | |
234 | return r; | |
235 | } | |
236 | ||
237 | long kvm_arch_dev_ioctl(struct file *filp, | |
238 | unsigned int ioctl, unsigned long arg) | |
239 | { | |
240 | return -EINVAL; | |
241 | } | |
242 | ||
749cf76c CD |
243 | |
244 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) | |
245 | { | |
246 | int err; | |
247 | struct kvm_vcpu *vcpu; | |
248 | ||
716139df CD |
249 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) { |
250 | err = -EBUSY; | |
251 | goto out; | |
252 | } | |
253 | ||
3caa2d8c AP |
254 | if (id >= kvm->arch.max_vcpus) { |
255 | err = -EINVAL; | |
256 | goto out; | |
257 | } | |
258 | ||
749cf76c CD |
259 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
260 | if (!vcpu) { | |
261 | err = -ENOMEM; | |
262 | goto out; | |
263 | } | |
264 | ||
265 | err = kvm_vcpu_init(vcpu, kvm, id); | |
266 | if (err) | |
267 | goto free_vcpu; | |
268 | ||
c8dddecd | 269 | err = create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP); |
d5d8184d CD |
270 | if (err) |
271 | goto vcpu_uninit; | |
272 | ||
749cf76c | 273 | return vcpu; |
d5d8184d CD |
274 | vcpu_uninit: |
275 | kvm_vcpu_uninit(vcpu); | |
749cf76c CD |
276 | free_vcpu: |
277 | kmem_cache_free(kvm_vcpu_cache, vcpu); | |
278 | out: | |
279 | return ERR_PTR(err); | |
280 | } | |
281 | ||
31928aa5 | 282 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
749cf76c | 283 | { |
6c3d63c9 | 284 | kvm_vgic_vcpu_early_init(vcpu); |
749cf76c CD |
285 | } |
286 | ||
287 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
288 | { | |
d5d8184d | 289 | kvm_mmu_free_memory_caches(vcpu); |
967f8427 | 290 | kvm_timer_vcpu_terminate(vcpu); |
c1bfb577 | 291 | kvm_vgic_vcpu_destroy(vcpu); |
5f0a714a | 292 | kvm_pmu_vcpu_destroy(vcpu); |
591d215a | 293 | kvm_vcpu_uninit(vcpu); |
d5d8184d | 294 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
749cf76c CD |
295 | } |
296 | ||
297 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) | |
298 | { | |
299 | kvm_arch_vcpu_free(vcpu); | |
300 | } | |
301 | ||
302 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) | |
303 | { | |
1a748478 | 304 | return kvm_timer_should_fire(vcpu); |
749cf76c CD |
305 | } |
306 | ||
d35268da CD |
307 | void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) |
308 | { | |
309 | kvm_timer_schedule(vcpu); | |
310 | } | |
311 | ||
312 | void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) | |
313 | { | |
314 | kvm_timer_unschedule(vcpu); | |
315 | } | |
316 | ||
749cf76c CD |
317 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
318 | { | |
f7ed45be CD |
319 | /* Force users to call KVM_ARM_VCPU_INIT */ |
320 | vcpu->arch.target = -1; | |
f7fa034d | 321 | bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); |
1a89dd91 | 322 | |
967f8427 MZ |
323 | /* Set up the timer */ |
324 | kvm_timer_vcpu_init(vcpu); | |
325 | ||
84e690bf AB |
326 | kvm_arm_reset_debug_ptr(vcpu); |
327 | ||
749cf76c CD |
328 | return 0; |
329 | } | |
330 | ||
749cf76c CD |
331 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
332 | { | |
94d0e598 MZ |
333 | int *last_ran; |
334 | ||
335 | last_ran = this_cpu_ptr(vcpu->kvm->arch.last_vcpu_ran); | |
336 | ||
337 | /* | |
338 | * We might get preempted before the vCPU actually runs, but | |
339 | * over-invalidation doesn't affect correctness. | |
340 | */ | |
341 | if (*last_ran != vcpu->vcpu_id) { | |
342 | kvm_call_hyp(__kvm_tlb_flush_local_vmid, vcpu); | |
343 | *last_ran = vcpu->vcpu_id; | |
344 | } | |
345 | ||
86ce8535 | 346 | vcpu->cpu = cpu; |
3de50da6 | 347 | vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); |
5b3e5e5b | 348 | |
1638a12d | 349 | kvm_arm_set_running_vcpu(vcpu); |
749cf76c CD |
350 | } |
351 | ||
352 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
353 | { | |
e9b152cb CD |
354 | /* |
355 | * The arch-generic KVM code expects the cpu field of a vcpu to be -1 | |
356 | * if the vcpu is no longer assigned to a cpu. This is used for the | |
357 | * optimized make_all_cpus_request path. | |
358 | */ | |
359 | vcpu->cpu = -1; | |
360 | ||
1638a12d | 361 | kvm_arm_set_running_vcpu(NULL); |
9b4a3004 | 362 | kvm_timer_vcpu_put(vcpu); |
749cf76c CD |
363 | } |
364 | ||
749cf76c CD |
365 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
366 | struct kvm_mp_state *mp_state) | |
367 | { | |
3781528e | 368 | if (vcpu->arch.power_off) |
ecccf0cc AB |
369 | mp_state->mp_state = KVM_MP_STATE_STOPPED; |
370 | else | |
371 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; | |
372 | ||
373 | return 0; | |
749cf76c CD |
374 | } |
375 | ||
376 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
377 | struct kvm_mp_state *mp_state) | |
378 | { | |
ecccf0cc AB |
379 | switch (mp_state->mp_state) { |
380 | case KVM_MP_STATE_RUNNABLE: | |
3781528e | 381 | vcpu->arch.power_off = false; |
ecccf0cc AB |
382 | break; |
383 | case KVM_MP_STATE_STOPPED: | |
3781528e | 384 | vcpu->arch.power_off = true; |
ecccf0cc AB |
385 | break; |
386 | default: | |
387 | return -EINVAL; | |
388 | } | |
389 | ||
390 | return 0; | |
749cf76c CD |
391 | } |
392 | ||
5b3e5e5b CD |
393 | /** |
394 | * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled | |
395 | * @v: The VCPU pointer | |
396 | * | |
397 | * If the guest CPU is not waiting for interrupts or an interrupt line is | |
398 | * asserted, the CPU is by definition runnable. | |
399 | */ | |
749cf76c CD |
400 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
401 | { | |
4f5f1dc0 | 402 | return ((!!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v)) |
3b92830a | 403 | && !v->arch.power_off && !v->arch.pause); |
749cf76c CD |
404 | } |
405 | ||
f7ed45be CD |
406 | /* Just ensure a guest exit from a particular CPU */ |
407 | static void exit_vm_noop(void *info) | |
408 | { | |
409 | } | |
410 | ||
411 | void force_vm_exit(const cpumask_t *mask) | |
412 | { | |
898f949f | 413 | preempt_disable(); |
f7ed45be | 414 | smp_call_function_many(mask, exit_vm_noop, NULL, true); |
898f949f | 415 | preempt_enable(); |
f7ed45be CD |
416 | } |
417 | ||
418 | /** | |
419 | * need_new_vmid_gen - check that the VMID is still valid | |
6a727b0b | 420 | * @kvm: The VM's VMID to check |
f7ed45be CD |
421 | * |
422 | * return true if there is a new generation of VMIDs being used | |
423 | * | |
424 | * The hardware supports only 256 values with the value zero reserved for the | |
425 | * host, so we check if an assigned value belongs to a previous generation, | |
426 | * which which requires us to assign a new value. If we're the first to use a | |
427 | * VMID for the new generation, we must flush necessary caches and TLBs on all | |
428 | * CPUs. | |
429 | */ | |
430 | static bool need_new_vmid_gen(struct kvm *kvm) | |
431 | { | |
432 | return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen)); | |
433 | } | |
434 | ||
435 | /** | |
436 | * update_vttbr - Update the VTTBR with a valid VMID before the guest runs | |
437 | * @kvm The guest that we are about to run | |
438 | * | |
439 | * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the | |
440 | * VM has a valid VMID, otherwise assigns a new one and flushes corresponding | |
441 | * caches and TLBs. | |
442 | */ | |
443 | static void update_vttbr(struct kvm *kvm) | |
444 | { | |
445 | phys_addr_t pgd_phys; | |
446 | u64 vmid; | |
447 | ||
448 | if (!need_new_vmid_gen(kvm)) | |
449 | return; | |
450 | ||
451 | spin_lock(&kvm_vmid_lock); | |
452 | ||
453 | /* | |
454 | * We need to re-check the vmid_gen here to ensure that if another vcpu | |
455 | * already allocated a valid vmid for this vm, then this vcpu should | |
456 | * use the same vmid. | |
457 | */ | |
458 | if (!need_new_vmid_gen(kvm)) { | |
459 | spin_unlock(&kvm_vmid_lock); | |
460 | return; | |
461 | } | |
462 | ||
463 | /* First user of a new VMID generation? */ | |
464 | if (unlikely(kvm_next_vmid == 0)) { | |
465 | atomic64_inc(&kvm_vmid_gen); | |
466 | kvm_next_vmid = 1; | |
467 | ||
468 | /* | |
469 | * On SMP we know no other CPUs can use this CPU's or each | |
470 | * other's VMID after force_vm_exit returns since the | |
471 | * kvm_vmid_lock blocks them from reentry to the guest. | |
472 | */ | |
473 | force_vm_exit(cpu_all_mask); | |
474 | /* | |
475 | * Now broadcast TLB + ICACHE invalidation over the inner | |
476 | * shareable domain to make sure all data structures are | |
477 | * clean. | |
478 | */ | |
479 | kvm_call_hyp(__kvm_flush_vm_context); | |
480 | } | |
481 | ||
482 | kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen); | |
483 | kvm->arch.vmid = kvm_next_vmid; | |
484 | kvm_next_vmid++; | |
20475f78 | 485 | kvm_next_vmid &= (1 << kvm_vmid_bits) - 1; |
f7ed45be CD |
486 | |
487 | /* update vttbr to be used with the new vmid */ | |
9163ee23 | 488 | pgd_phys = virt_to_phys(kvm->arch.pgd); |
dbff124e | 489 | BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK); |
20475f78 | 490 | vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK(kvm_vmid_bits); |
dbff124e | 491 | kvm->arch.vttbr = pgd_phys | vmid; |
f7ed45be CD |
492 | |
493 | spin_unlock(&kvm_vmid_lock); | |
494 | } | |
495 | ||
f7ed45be CD |
496 | static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |
497 | { | |
05971120 | 498 | struct kvm *kvm = vcpu->kvm; |
41a54482 | 499 | int ret = 0; |
e1ba0207 | 500 | |
f7ed45be CD |
501 | if (likely(vcpu->arch.has_run_once)) |
502 | return 0; | |
503 | ||
504 | vcpu->arch.has_run_once = true; | |
aa024c2f | 505 | |
01ac5e34 | 506 | /* |
6d3cfbe2 PM |
507 | * Map the VGIC hardware resources before running a vcpu the first |
508 | * time on this VM. | |
01ac5e34 | 509 | */ |
c2f58514 | 510 | if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) { |
05971120 | 511 | ret = kvm_vgic_map_resources(kvm); |
01ac5e34 MZ |
512 | if (ret) |
513 | return ret; | |
514 | } | |
515 | ||
05971120 CD |
516 | /* |
517 | * Enable the arch timers only if we have an in-kernel VGIC | |
518 | * and it has been properly initialized, since we cannot handle | |
519 | * interrupts from the virtual timer with a userspace gic. | |
520 | */ | |
521 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) | |
41a54482 | 522 | ret = kvm_timer_enable(vcpu); |
05971120 | 523 | |
41a54482 | 524 | return ret; |
f7ed45be CD |
525 | } |
526 | ||
c1426e4c EA |
527 | bool kvm_arch_intc_initialized(struct kvm *kvm) |
528 | { | |
529 | return vgic_initialized(kvm); | |
530 | } | |
531 | ||
b13216cf | 532 | void kvm_arm_halt_guest(struct kvm *kvm) |
3b92830a EA |
533 | { |
534 | int i; | |
535 | struct kvm_vcpu *vcpu; | |
536 | ||
537 | kvm_for_each_vcpu(i, vcpu, kvm) | |
538 | vcpu->arch.pause = true; | |
b13216cf | 539 | kvm_make_all_cpus_request(kvm, KVM_REQ_VCPU_EXIT); |
3b92830a EA |
540 | } |
541 | ||
35a2d585 CD |
542 | void kvm_arm_halt_vcpu(struct kvm_vcpu *vcpu) |
543 | { | |
544 | vcpu->arch.pause = true; | |
545 | kvm_vcpu_kick(vcpu); | |
546 | } | |
547 | ||
548 | void kvm_arm_resume_vcpu(struct kvm_vcpu *vcpu) | |
b13216cf CD |
549 | { |
550 | struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu); | |
551 | ||
552 | vcpu->arch.pause = false; | |
553 | swake_up(wq); | |
554 | } | |
555 | ||
556 | void kvm_arm_resume_guest(struct kvm *kvm) | |
3b92830a EA |
557 | { |
558 | int i; | |
559 | struct kvm_vcpu *vcpu; | |
560 | ||
b13216cf CD |
561 | kvm_for_each_vcpu(i, vcpu, kvm) |
562 | kvm_arm_resume_vcpu(vcpu); | |
3b92830a EA |
563 | } |
564 | ||
3781528e | 565 | static void vcpu_sleep(struct kvm_vcpu *vcpu) |
aa024c2f | 566 | { |
8577370f | 567 | struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu); |
aa024c2f | 568 | |
8577370f | 569 | swait_event_interruptible(*wq, ((!vcpu->arch.power_off) && |
3b92830a | 570 | (!vcpu->arch.pause))); |
aa024c2f MZ |
571 | } |
572 | ||
e8180dca AP |
573 | static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) |
574 | { | |
575 | return vcpu->arch.target >= 0; | |
576 | } | |
577 | ||
f7ed45be CD |
578 | /** |
579 | * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code | |
580 | * @vcpu: The VCPU pointer | |
581 | * @run: The kvm_run structure pointer used for userspace state exchange | |
582 | * | |
583 | * This function is called through the VCPU_RUN ioctl called from user space. It | |
584 | * will execute VM code in a loop until the time slice for the process is used | |
585 | * or some emulation is needed from user space in which case the function will | |
586 | * return with return value 0 and with the kvm_run structure filled in with the | |
587 | * required data for the requested emulation. | |
588 | */ | |
749cf76c CD |
589 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
590 | { | |
f7ed45be CD |
591 | int ret; |
592 | sigset_t sigsaved; | |
593 | ||
e8180dca | 594 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
f7ed45be CD |
595 | return -ENOEXEC; |
596 | ||
597 | ret = kvm_vcpu_first_run_init(vcpu); | |
598 | if (ret) | |
599 | return ret; | |
600 | ||
45e96ea6 CD |
601 | if (run->exit_reason == KVM_EXIT_MMIO) { |
602 | ret = kvm_handle_mmio_return(vcpu, vcpu->run); | |
603 | if (ret) | |
604 | return ret; | |
605 | } | |
606 | ||
f7ed45be CD |
607 | if (vcpu->sigset_active) |
608 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
609 | ||
610 | ret = 1; | |
611 | run->exit_reason = KVM_EXIT_UNKNOWN; | |
612 | while (ret > 0) { | |
613 | /* | |
614 | * Check conditions before entering the guest | |
615 | */ | |
616 | cond_resched(); | |
617 | ||
618 | update_vttbr(vcpu->kvm); | |
619 | ||
3b92830a | 620 | if (vcpu->arch.power_off || vcpu->arch.pause) |
3781528e | 621 | vcpu_sleep(vcpu); |
aa024c2f | 622 | |
abdf5843 MZ |
623 | /* |
624 | * Preparing the interrupts to be injected also | |
625 | * involves poking the GIC, which must be done in a | |
626 | * non-preemptible context. | |
627 | */ | |
1b3d546d | 628 | preempt_disable(); |
b02386eb | 629 | kvm_pmu_flush_hwstate(vcpu); |
7e16aa81 | 630 | kvm_timer_flush_hwstate(vcpu); |
abdf5843 MZ |
631 | kvm_vgic_flush_hwstate(vcpu); |
632 | ||
f7ed45be CD |
633 | local_irq_disable(); |
634 | ||
635 | /* | |
636 | * Re-check atomic conditions | |
637 | */ | |
638 | if (signal_pending(current)) { | |
639 | ret = -EINTR; | |
640 | run->exit_reason = KVM_EXIT_INTR; | |
641 | } | |
642 | ||
101d3da0 | 643 | if (ret <= 0 || need_new_vmid_gen(vcpu->kvm) || |
3b92830a | 644 | vcpu->arch.power_off || vcpu->arch.pause) { |
f7ed45be | 645 | local_irq_enable(); |
b02386eb | 646 | kvm_pmu_sync_hwstate(vcpu); |
4b4b4512 | 647 | kvm_timer_sync_hwstate(vcpu); |
1a89dd91 | 648 | kvm_vgic_sync_hwstate(vcpu); |
abdf5843 | 649 | preempt_enable(); |
f7ed45be CD |
650 | continue; |
651 | } | |
652 | ||
56c7f5e7 AB |
653 | kvm_arm_setup_debug(vcpu); |
654 | ||
f7ed45be CD |
655 | /************************************************************** |
656 | * Enter the guest | |
657 | */ | |
658 | trace_kvm_entry(*vcpu_pc(vcpu)); | |
6edaa530 | 659 | guest_enter_irqoff(); |
f7ed45be CD |
660 | vcpu->mode = IN_GUEST_MODE; |
661 | ||
662 | ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); | |
663 | ||
664 | vcpu->mode = OUTSIDE_GUEST_MODE; | |
b19e6892 | 665 | vcpu->stat.exits++; |
1b3d546d CD |
666 | /* |
667 | * Back from guest | |
668 | *************************************************************/ | |
669 | ||
56c7f5e7 AB |
670 | kvm_arm_clear_debug(vcpu); |
671 | ||
f7ed45be CD |
672 | /* |
673 | * We may have taken a host interrupt in HYP mode (ie | |
674 | * while executing the guest). This interrupt is still | |
675 | * pending, as we haven't serviced it yet! | |
676 | * | |
677 | * We're now back in SVC mode, with interrupts | |
678 | * disabled. Enabling the interrupts now will have | |
679 | * the effect of taking the interrupt again, in SVC | |
680 | * mode this time. | |
681 | */ | |
682 | local_irq_enable(); | |
683 | ||
684 | /* | |
6edaa530 | 685 | * We do local_irq_enable() before calling guest_exit() so |
1b3d546d CD |
686 | * that if a timer interrupt hits while running the guest we |
687 | * account that tick as being spent in the guest. We enable | |
6edaa530 | 688 | * preemption after calling guest_exit() so that if we get |
1b3d546d CD |
689 | * preempted we make sure ticks after that is not counted as |
690 | * guest time. | |
691 | */ | |
6edaa530 | 692 | guest_exit(); |
b5905dc1 | 693 | trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu)); |
1b3d546d | 694 | |
4b4b4512 | 695 | /* |
b02386eb SZ |
696 | * We must sync the PMU and timer state before the vgic state so |
697 | * that the vgic can properly sample the updated state of the | |
4b4b4512 CD |
698 | * interrupt line. |
699 | */ | |
b02386eb | 700 | kvm_pmu_sync_hwstate(vcpu); |
4b4b4512 CD |
701 | kvm_timer_sync_hwstate(vcpu); |
702 | ||
1a89dd91 | 703 | kvm_vgic_sync_hwstate(vcpu); |
abdf5843 MZ |
704 | |
705 | preempt_enable(); | |
706 | ||
f7ed45be CD |
707 | ret = handle_exit(vcpu, run, ret); |
708 | } | |
709 | ||
710 | if (vcpu->sigset_active) | |
711 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
712 | return ret; | |
749cf76c CD |
713 | } |
714 | ||
86ce8535 CD |
715 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
716 | { | |
717 | int bit_index; | |
718 | bool set; | |
719 | unsigned long *ptr; | |
720 | ||
721 | if (number == KVM_ARM_IRQ_CPU_IRQ) | |
722 | bit_index = __ffs(HCR_VI); | |
723 | else /* KVM_ARM_IRQ_CPU_FIQ */ | |
724 | bit_index = __ffs(HCR_VF); | |
725 | ||
726 | ptr = (unsigned long *)&vcpu->arch.irq_lines; | |
727 | if (level) | |
728 | set = test_and_set_bit(bit_index, ptr); | |
729 | else | |
730 | set = test_and_clear_bit(bit_index, ptr); | |
731 | ||
732 | /* | |
733 | * If we didn't change anything, no need to wake up or kick other CPUs | |
734 | */ | |
735 | if (set == level) | |
736 | return 0; | |
737 | ||
738 | /* | |
739 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and | |
740 | * trigger a world-switch round on the running physical CPU to set the | |
741 | * virtual IRQ/FIQ fields in the HCR appropriately. | |
742 | */ | |
743 | kvm_vcpu_kick(vcpu); | |
744 | ||
745 | return 0; | |
746 | } | |
747 | ||
79558f11 AG |
748 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
749 | bool line_status) | |
86ce8535 CD |
750 | { |
751 | u32 irq = irq_level->irq; | |
752 | unsigned int irq_type, vcpu_idx, irq_num; | |
753 | int nrcpus = atomic_read(&kvm->online_vcpus); | |
754 | struct kvm_vcpu *vcpu = NULL; | |
755 | bool level = irq_level->level; | |
756 | ||
757 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; | |
758 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; | |
759 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; | |
760 | ||
761 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); | |
762 | ||
5863c2ce MZ |
763 | switch (irq_type) { |
764 | case KVM_ARM_IRQ_TYPE_CPU: | |
765 | if (irqchip_in_kernel(kvm)) | |
766 | return -ENXIO; | |
86ce8535 | 767 | |
5863c2ce MZ |
768 | if (vcpu_idx >= nrcpus) |
769 | return -EINVAL; | |
86ce8535 | 770 | |
5863c2ce MZ |
771 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
772 | if (!vcpu) | |
773 | return -EINVAL; | |
86ce8535 | 774 | |
5863c2ce MZ |
775 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) |
776 | return -EINVAL; | |
777 | ||
778 | return vcpu_interrupt_line(vcpu, irq_num, level); | |
779 | case KVM_ARM_IRQ_TYPE_PPI: | |
780 | if (!irqchip_in_kernel(kvm)) | |
781 | return -ENXIO; | |
782 | ||
783 | if (vcpu_idx >= nrcpus) | |
784 | return -EINVAL; | |
785 | ||
786 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); | |
787 | if (!vcpu) | |
788 | return -EINVAL; | |
789 | ||
790 | if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) | |
791 | return -EINVAL; | |
86ce8535 | 792 | |
5863c2ce MZ |
793 | return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level); |
794 | case KVM_ARM_IRQ_TYPE_SPI: | |
795 | if (!irqchip_in_kernel(kvm)) | |
796 | return -ENXIO; | |
797 | ||
fd1d0ddf | 798 | if (irq_num < VGIC_NR_PRIVATE_IRQS) |
5863c2ce MZ |
799 | return -EINVAL; |
800 | ||
801 | return kvm_vgic_inject_irq(kvm, 0, irq_num, level); | |
802 | } | |
803 | ||
804 | return -EINVAL; | |
86ce8535 CD |
805 | } |
806 | ||
f7fa034d CD |
807 | static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
808 | const struct kvm_vcpu_init *init) | |
809 | { | |
810 | unsigned int i; | |
811 | int phys_target = kvm_target_cpu(); | |
812 | ||
813 | if (init->target != phys_target) | |
814 | return -EINVAL; | |
815 | ||
816 | /* | |
817 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
818 | * use the same target. | |
819 | */ | |
820 | if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) | |
821 | return -EINVAL; | |
822 | ||
823 | /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ | |
824 | for (i = 0; i < sizeof(init->features) * 8; i++) { | |
825 | bool set = (init->features[i / 32] & (1 << (i % 32))); | |
826 | ||
827 | if (set && i >= KVM_VCPU_MAX_FEATURES) | |
828 | return -ENOENT; | |
829 | ||
830 | /* | |
831 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must | |
832 | * use the same feature set. | |
833 | */ | |
834 | if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && | |
835 | test_bit(i, vcpu->arch.features) != set) | |
836 | return -EINVAL; | |
837 | ||
838 | if (set) | |
839 | set_bit(i, vcpu->arch.features); | |
840 | } | |
841 | ||
842 | vcpu->arch.target = phys_target; | |
843 | ||
844 | /* Now we know what it is, we can reset it. */ | |
845 | return kvm_reset_vcpu(vcpu); | |
846 | } | |
847 | ||
848 | ||
478a8237 CD |
849 | static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, |
850 | struct kvm_vcpu_init *init) | |
851 | { | |
852 | int ret; | |
853 | ||
854 | ret = kvm_vcpu_set_target(vcpu, init); | |
855 | if (ret) | |
856 | return ret; | |
857 | ||
957db105 CD |
858 | /* |
859 | * Ensure a rebooted VM will fault in RAM pages and detect if the | |
860 | * guest MMU is turned off and flush the caches as needed. | |
861 | */ | |
862 | if (vcpu->arch.has_run_once) | |
863 | stage2_unmap_vm(vcpu->kvm); | |
864 | ||
b856a591 CD |
865 | vcpu_reset_hcr(vcpu); |
866 | ||
478a8237 | 867 | /* |
3781528e | 868 | * Handle the "start in power-off" case. |
478a8237 | 869 | */ |
03f1d4c1 | 870 | if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) |
3781528e | 871 | vcpu->arch.power_off = true; |
3ad8b3de | 872 | else |
3781528e | 873 | vcpu->arch.power_off = false; |
478a8237 CD |
874 | |
875 | return 0; | |
876 | } | |
877 | ||
f577f6c2 SZ |
878 | static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu, |
879 | struct kvm_device_attr *attr) | |
880 | { | |
881 | int ret = -ENXIO; | |
882 | ||
883 | switch (attr->group) { | |
884 | default: | |
bb0c70bc | 885 | ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr); |
f577f6c2 SZ |
886 | break; |
887 | } | |
888 | ||
889 | return ret; | |
890 | } | |
891 | ||
892 | static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu, | |
893 | struct kvm_device_attr *attr) | |
894 | { | |
895 | int ret = -ENXIO; | |
896 | ||
897 | switch (attr->group) { | |
898 | default: | |
bb0c70bc | 899 | ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr); |
f577f6c2 SZ |
900 | break; |
901 | } | |
902 | ||
903 | return ret; | |
904 | } | |
905 | ||
906 | static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu, | |
907 | struct kvm_device_attr *attr) | |
908 | { | |
909 | int ret = -ENXIO; | |
910 | ||
911 | switch (attr->group) { | |
912 | default: | |
bb0c70bc | 913 | ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr); |
f577f6c2 SZ |
914 | break; |
915 | } | |
916 | ||
917 | return ret; | |
918 | } | |
919 | ||
749cf76c CD |
920 | long kvm_arch_vcpu_ioctl(struct file *filp, |
921 | unsigned int ioctl, unsigned long arg) | |
922 | { | |
923 | struct kvm_vcpu *vcpu = filp->private_data; | |
924 | void __user *argp = (void __user *)arg; | |
f577f6c2 | 925 | struct kvm_device_attr attr; |
749cf76c CD |
926 | |
927 | switch (ioctl) { | |
928 | case KVM_ARM_VCPU_INIT: { | |
929 | struct kvm_vcpu_init init; | |
930 | ||
931 | if (copy_from_user(&init, argp, sizeof(init))) | |
932 | return -EFAULT; | |
933 | ||
478a8237 | 934 | return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); |
749cf76c CD |
935 | } |
936 | case KVM_SET_ONE_REG: | |
937 | case KVM_GET_ONE_REG: { | |
938 | struct kvm_one_reg reg; | |
e8180dca AP |
939 | |
940 | if (unlikely(!kvm_vcpu_initialized(vcpu))) | |
941 | return -ENOEXEC; | |
942 | ||
749cf76c CD |
943 | if (copy_from_user(®, argp, sizeof(reg))) |
944 | return -EFAULT; | |
945 | if (ioctl == KVM_SET_ONE_REG) | |
946 | return kvm_arm_set_reg(vcpu, ®); | |
947 | else | |
948 | return kvm_arm_get_reg(vcpu, ®); | |
949 | } | |
950 | case KVM_GET_REG_LIST: { | |
951 | struct kvm_reg_list __user *user_list = argp; | |
952 | struct kvm_reg_list reg_list; | |
953 | unsigned n; | |
954 | ||
e8180dca AP |
955 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
956 | return -ENOEXEC; | |
957 | ||
749cf76c CD |
958 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) |
959 | return -EFAULT; | |
960 | n = reg_list.n; | |
961 | reg_list.n = kvm_arm_num_regs(vcpu); | |
962 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) | |
963 | return -EFAULT; | |
964 | if (n < reg_list.n) | |
965 | return -E2BIG; | |
966 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); | |
967 | } | |
f577f6c2 SZ |
968 | case KVM_SET_DEVICE_ATTR: { |
969 | if (copy_from_user(&attr, argp, sizeof(attr))) | |
970 | return -EFAULT; | |
971 | return kvm_arm_vcpu_set_attr(vcpu, &attr); | |
972 | } | |
973 | case KVM_GET_DEVICE_ATTR: { | |
974 | if (copy_from_user(&attr, argp, sizeof(attr))) | |
975 | return -EFAULT; | |
976 | return kvm_arm_vcpu_get_attr(vcpu, &attr); | |
977 | } | |
978 | case KVM_HAS_DEVICE_ATTR: { | |
979 | if (copy_from_user(&attr, argp, sizeof(attr))) | |
980 | return -EFAULT; | |
981 | return kvm_arm_vcpu_has_attr(vcpu, &attr); | |
982 | } | |
749cf76c CD |
983 | default: |
984 | return -EINVAL; | |
985 | } | |
986 | } | |
987 | ||
53c810c3 MS |
988 | /** |
989 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot | |
990 | * @kvm: kvm instance | |
991 | * @log: slot id and address to which we copy the log | |
992 | * | |
993 | * Steps 1-4 below provide general overview of dirty page logging. See | |
994 | * kvm_get_dirty_log_protect() function description for additional details. | |
995 | * | |
996 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we | |
997 | * always flush the TLB (step 4) even if previous step failed and the dirty | |
998 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API | |
999 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures | |
1000 | * writes will be marked dirty for next log read. | |
1001 | * | |
1002 | * 1. Take a snapshot of the bit and clear it if needed. | |
1003 | * 2. Write protect the corresponding page. | |
1004 | * 3. Copy the snapshot to the userspace. | |
1005 | * 4. Flush TLB's if needed. | |
1006 | */ | |
749cf76c CD |
1007 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
1008 | { | |
53c810c3 MS |
1009 | bool is_dirty = false; |
1010 | int r; | |
1011 | ||
1012 | mutex_lock(&kvm->slots_lock); | |
1013 | ||
1014 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); | |
1015 | ||
1016 | if (is_dirty) | |
1017 | kvm_flush_remote_tlbs(kvm); | |
1018 | ||
1019 | mutex_unlock(&kvm->slots_lock); | |
1020 | return r; | |
749cf76c CD |
1021 | } |
1022 | ||
3401d546 CD |
1023 | static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, |
1024 | struct kvm_arm_device_addr *dev_addr) | |
1025 | { | |
330690cd CD |
1026 | unsigned long dev_id, type; |
1027 | ||
1028 | dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> | |
1029 | KVM_ARM_DEVICE_ID_SHIFT; | |
1030 | type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> | |
1031 | KVM_ARM_DEVICE_TYPE_SHIFT; | |
1032 | ||
1033 | switch (dev_id) { | |
1034 | case KVM_ARM_DEVICE_VGIC_V2: | |
c7da6fa4 PF |
1035 | if (!vgic_present) |
1036 | return -ENXIO; | |
ce01e4e8 | 1037 | return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); |
330690cd CD |
1038 | default: |
1039 | return -ENODEV; | |
1040 | } | |
3401d546 CD |
1041 | } |
1042 | ||
749cf76c CD |
1043 | long kvm_arch_vm_ioctl(struct file *filp, |
1044 | unsigned int ioctl, unsigned long arg) | |
1045 | { | |
3401d546 CD |
1046 | struct kvm *kvm = filp->private_data; |
1047 | void __user *argp = (void __user *)arg; | |
1048 | ||
1049 | switch (ioctl) { | |
5863c2ce | 1050 | case KVM_CREATE_IRQCHIP: { |
a28ebea2 | 1051 | int ret; |
c7da6fa4 PF |
1052 | if (!vgic_present) |
1053 | return -ENXIO; | |
a28ebea2 CD |
1054 | mutex_lock(&kvm->lock); |
1055 | ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); | |
1056 | mutex_unlock(&kvm->lock); | |
1057 | return ret; | |
5863c2ce | 1058 | } |
3401d546 CD |
1059 | case KVM_ARM_SET_DEVICE_ADDR: { |
1060 | struct kvm_arm_device_addr dev_addr; | |
1061 | ||
1062 | if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) | |
1063 | return -EFAULT; | |
1064 | return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); | |
1065 | } | |
42c4e0c7 AP |
1066 | case KVM_ARM_PREFERRED_TARGET: { |
1067 | int err; | |
1068 | struct kvm_vcpu_init init; | |
1069 | ||
1070 | err = kvm_vcpu_preferred_target(&init); | |
1071 | if (err) | |
1072 | return err; | |
1073 | ||
1074 | if (copy_to_user(argp, &init, sizeof(init))) | |
1075 | return -EFAULT; | |
1076 | ||
1077 | return 0; | |
1078 | } | |
3401d546 CD |
1079 | default: |
1080 | return -EINVAL; | |
1081 | } | |
749cf76c CD |
1082 | } |
1083 | ||
d157f4a5 | 1084 | static void cpu_init_hyp_mode(void *dummy) |
342cd0ab | 1085 | { |
dac288f7 | 1086 | phys_addr_t pgd_ptr; |
342cd0ab CD |
1087 | unsigned long hyp_stack_ptr; |
1088 | unsigned long stack_page; | |
1089 | unsigned long vector_ptr; | |
1090 | ||
1091 | /* Switch from the HYP stub to our own HYP init vector */ | |
5a677ce0 | 1092 | __hyp_set_vectors(kvm_get_idmap_vector()); |
342cd0ab | 1093 | |
dac288f7 | 1094 | pgd_ptr = kvm_mmu_get_httbr(); |
1436c1aa | 1095 | stack_page = __this_cpu_read(kvm_arm_hyp_stack_page); |
342cd0ab | 1096 | hyp_stack_ptr = stack_page + PAGE_SIZE; |
a0bf9776 | 1097 | vector_ptr = (unsigned long)kvm_ksym_ref(__kvm_hyp_vector); |
342cd0ab | 1098 | |
12fda812 | 1099 | __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr); |
35a2491a | 1100 | __cpu_init_stage2(); |
56c7f5e7 | 1101 | |
488f94d7 JL |
1102 | if (is_kernel_in_hyp_mode()) |
1103 | kvm_timer_init_vhe(); | |
1104 | ||
56c7f5e7 | 1105 | kvm_arm_init_debug(); |
342cd0ab CD |
1106 | } |
1107 | ||
5f5560b1 JM |
1108 | static void cpu_hyp_reinit(void) |
1109 | { | |
1110 | if (is_kernel_in_hyp_mode()) { | |
1111 | /* | |
67f69197 | 1112 | * __cpu_init_stage2() is safe to call even if the PM |
5f5560b1 JM |
1113 | * event was cancelled before the CPU was reset. |
1114 | */ | |
67f69197 | 1115 | __cpu_init_stage2(); |
5f5560b1 JM |
1116 | } else { |
1117 | if (__hyp_get_vectors() == hyp_default_vectors) | |
1118 | cpu_init_hyp_mode(NULL); | |
1119 | } | |
1120 | } | |
1121 | ||
67f69197 | 1122 | static void cpu_hyp_reset(void) |
d157f4a5 | 1123 | { |
12fda812 | 1124 | if (!is_kernel_in_hyp_mode()) |
e537ecd7 MZ |
1125 | __cpu_reset_hyp_mode(hyp_default_vectors, |
1126 | kvm_get_idmap_start()); | |
67f69197 AT |
1127 | } |
1128 | ||
1129 | static void _kvm_arch_hardware_enable(void *discard) | |
1130 | { | |
1131 | if (!__this_cpu_read(kvm_arm_hardware_enabled)) { | |
5f5560b1 | 1132 | cpu_hyp_reinit(); |
67f69197 | 1133 | __this_cpu_write(kvm_arm_hardware_enabled, 1); |
d157f4a5 | 1134 | } |
67f69197 | 1135 | } |
d157f4a5 | 1136 | |
67f69197 AT |
1137 | int kvm_arch_hardware_enable(void) |
1138 | { | |
1139 | _kvm_arch_hardware_enable(NULL); | |
1140 | return 0; | |
342cd0ab CD |
1141 | } |
1142 | ||
67f69197 AT |
1143 | static void _kvm_arch_hardware_disable(void *discard) |
1144 | { | |
1145 | if (__this_cpu_read(kvm_arm_hardware_enabled)) { | |
1146 | cpu_hyp_reset(); | |
1147 | __this_cpu_write(kvm_arm_hardware_enabled, 0); | |
1148 | } | |
1149 | } | |
1150 | ||
1151 | void kvm_arch_hardware_disable(void) | |
1152 | { | |
1153 | _kvm_arch_hardware_disable(NULL); | |
1154 | } | |
d157f4a5 | 1155 | |
1fcf7ce0 LP |
1156 | #ifdef CONFIG_CPU_PM |
1157 | static int hyp_init_cpu_pm_notifier(struct notifier_block *self, | |
1158 | unsigned long cmd, | |
1159 | void *v) | |
1160 | { | |
67f69197 AT |
1161 | /* |
1162 | * kvm_arm_hardware_enabled is left with its old value over | |
1163 | * PM_ENTER->PM_EXIT. It is used to indicate PM_EXIT should | |
1164 | * re-enable hyp. | |
1165 | */ | |
1166 | switch (cmd) { | |
1167 | case CPU_PM_ENTER: | |
1168 | if (__this_cpu_read(kvm_arm_hardware_enabled)) | |
1169 | /* | |
1170 | * don't update kvm_arm_hardware_enabled here | |
1171 | * so that the hardware will be re-enabled | |
1172 | * when we resume. See below. | |
1173 | */ | |
1174 | cpu_hyp_reset(); | |
1175 | ||
1fcf7ce0 | 1176 | return NOTIFY_OK; |
67f69197 AT |
1177 | case CPU_PM_EXIT: |
1178 | if (__this_cpu_read(kvm_arm_hardware_enabled)) | |
1179 | /* The hardware was enabled before suspend. */ | |
1180 | cpu_hyp_reinit(); | |
1fcf7ce0 | 1181 | |
67f69197 AT |
1182 | return NOTIFY_OK; |
1183 | ||
1184 | default: | |
1185 | return NOTIFY_DONE; | |
1186 | } | |
1fcf7ce0 LP |
1187 | } |
1188 | ||
1189 | static struct notifier_block hyp_init_cpu_pm_nb = { | |
1190 | .notifier_call = hyp_init_cpu_pm_notifier, | |
1191 | }; | |
1192 | ||
1193 | static void __init hyp_cpu_pm_init(void) | |
1194 | { | |
1195 | cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); | |
1196 | } | |
06a71a24 SH |
1197 | static void __init hyp_cpu_pm_exit(void) |
1198 | { | |
1199 | cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb); | |
1200 | } | |
1fcf7ce0 LP |
1201 | #else |
1202 | static inline void hyp_cpu_pm_init(void) | |
1203 | { | |
1204 | } | |
06a71a24 SH |
1205 | static inline void hyp_cpu_pm_exit(void) |
1206 | { | |
1207 | } | |
1fcf7ce0 LP |
1208 | #endif |
1209 | ||
1e947bad MZ |
1210 | static void teardown_common_resources(void) |
1211 | { | |
1212 | free_percpu(kvm_host_cpu_state); | |
1213 | } | |
1214 | ||
1215 | static int init_common_resources(void) | |
1216 | { | |
1217 | kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); | |
1218 | if (!kvm_host_cpu_state) { | |
1219 | kvm_err("Cannot allocate host CPU state\n"); | |
1220 | return -ENOMEM; | |
1221 | } | |
1222 | ||
61349937 VM |
1223 | /* set size of VMID supported by CPU */ |
1224 | kvm_vmid_bits = kvm_get_vmid_bits(); | |
1225 | kvm_info("%d-bit VMID\n", kvm_vmid_bits); | |
1226 | ||
1e947bad MZ |
1227 | return 0; |
1228 | } | |
1229 | ||
1230 | static int init_subsystems(void) | |
1231 | { | |
67f69197 | 1232 | int err = 0; |
1e947bad | 1233 | |
5f5560b1 | 1234 | /* |
67f69197 | 1235 | * Enable hardware so that subsystem initialisation can access EL2. |
5f5560b1 | 1236 | */ |
67f69197 | 1237 | on_each_cpu(_kvm_arch_hardware_enable, NULL, 1); |
5f5560b1 JM |
1238 | |
1239 | /* | |
1240 | * Register CPU lower-power notifier | |
1241 | */ | |
1242 | hyp_cpu_pm_init(); | |
1243 | ||
1e947bad MZ |
1244 | /* |
1245 | * Init HYP view of VGIC | |
1246 | */ | |
1247 | err = kvm_vgic_hyp_init(); | |
1248 | switch (err) { | |
1249 | case 0: | |
1250 | vgic_present = true; | |
1251 | break; | |
1252 | case -ENODEV: | |
1253 | case -ENXIO: | |
1254 | vgic_present = false; | |
67f69197 | 1255 | err = 0; |
1e947bad MZ |
1256 | break; |
1257 | default: | |
67f69197 | 1258 | goto out; |
1e947bad MZ |
1259 | } |
1260 | ||
1261 | /* | |
1262 | * Init HYP architected timer support | |
1263 | */ | |
1264 | err = kvm_timer_hyp_init(); | |
1265 | if (err) | |
67f69197 | 1266 | goto out; |
1e947bad MZ |
1267 | |
1268 | kvm_perf_init(); | |
1269 | kvm_coproc_table_init(); | |
1270 | ||
67f69197 AT |
1271 | out: |
1272 | on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); | |
1273 | ||
1274 | return err; | |
1e947bad MZ |
1275 | } |
1276 | ||
1277 | static void teardown_hyp_mode(void) | |
1278 | { | |
1279 | int cpu; | |
1280 | ||
1281 | if (is_kernel_in_hyp_mode()) | |
1282 | return; | |
1283 | ||
1284 | free_hyp_pgds(); | |
1285 | for_each_possible_cpu(cpu) | |
1286 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); | |
06a71a24 | 1287 | hyp_cpu_pm_exit(); |
1e947bad MZ |
1288 | } |
1289 | ||
1290 | static int init_vhe_mode(void) | |
1291 | { | |
1e947bad MZ |
1292 | kvm_info("VHE mode initialized successfully\n"); |
1293 | return 0; | |
1294 | } | |
1295 | ||
342cd0ab CD |
1296 | /** |
1297 | * Inits Hyp-mode on all online CPUs | |
1298 | */ | |
1299 | static int init_hyp_mode(void) | |
1300 | { | |
342cd0ab CD |
1301 | int cpu; |
1302 | int err = 0; | |
1303 | ||
1304 | /* | |
1305 | * Allocate Hyp PGD and setup Hyp identity mapping | |
1306 | */ | |
1307 | err = kvm_mmu_init(); | |
1308 | if (err) | |
1309 | goto out_err; | |
1310 | ||
1311 | /* | |
1312 | * It is probably enough to obtain the default on one | |
1313 | * CPU. It's unlikely to be different on the others. | |
1314 | */ | |
1315 | hyp_default_vectors = __hyp_get_vectors(); | |
1316 | ||
1317 | /* | |
1318 | * Allocate stack pages for Hypervisor-mode | |
1319 | */ | |
1320 | for_each_possible_cpu(cpu) { | |
1321 | unsigned long stack_page; | |
1322 | ||
1323 | stack_page = __get_free_page(GFP_KERNEL); | |
1324 | if (!stack_page) { | |
1325 | err = -ENOMEM; | |
1e947bad | 1326 | goto out_err; |
342cd0ab CD |
1327 | } |
1328 | ||
1329 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; | |
1330 | } | |
1331 | ||
342cd0ab CD |
1332 | /* |
1333 | * Map the Hyp-code called directly from the host | |
1334 | */ | |
588ab3f9 | 1335 | err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start), |
59002705 | 1336 | kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC); |
342cd0ab CD |
1337 | if (err) { |
1338 | kvm_err("Cannot map world-switch code\n"); | |
1e947bad | 1339 | goto out_err; |
342cd0ab CD |
1340 | } |
1341 | ||
a0bf9776 | 1342 | err = create_hyp_mappings(kvm_ksym_ref(__start_rodata), |
74a6b888 | 1343 | kvm_ksym_ref(__end_rodata), PAGE_HYP_RO); |
910917bb MZ |
1344 | if (err) { |
1345 | kvm_err("Cannot map rodata section\n"); | |
c8ea0395 MZ |
1346 | goto out_err; |
1347 | } | |
1348 | ||
1349 | err = create_hyp_mappings(kvm_ksym_ref(__bss_start), | |
1350 | kvm_ksym_ref(__bss_stop), PAGE_HYP_RO); | |
1351 | if (err) { | |
1352 | kvm_err("Cannot map bss section\n"); | |
1e947bad | 1353 | goto out_err; |
910917bb MZ |
1354 | } |
1355 | ||
342cd0ab CD |
1356 | /* |
1357 | * Map the Hyp stack pages | |
1358 | */ | |
1359 | for_each_possible_cpu(cpu) { | |
1360 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); | |
c8dddecd MZ |
1361 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE, |
1362 | PAGE_HYP); | |
342cd0ab CD |
1363 | |
1364 | if (err) { | |
1365 | kvm_err("Cannot map hyp stack\n"); | |
1e947bad | 1366 | goto out_err; |
342cd0ab CD |
1367 | } |
1368 | } | |
1369 | ||
342cd0ab | 1370 | for_each_possible_cpu(cpu) { |
3de50da6 | 1371 | kvm_cpu_context_t *cpu_ctxt; |
342cd0ab | 1372 | |
3de50da6 | 1373 | cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); |
c8dddecd | 1374 | err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1, PAGE_HYP); |
342cd0ab CD |
1375 | |
1376 | if (err) { | |
3de50da6 | 1377 | kvm_err("Cannot map host CPU state: %d\n", err); |
1e947bad | 1378 | goto out_err; |
342cd0ab CD |
1379 | } |
1380 | } | |
1381 | ||
1382 | kvm_info("Hyp mode initialized successfully\n"); | |
210552c1 | 1383 | |
342cd0ab | 1384 | return 0; |
1e947bad | 1385 | |
342cd0ab | 1386 | out_err: |
1e947bad | 1387 | teardown_hyp_mode(); |
342cd0ab CD |
1388 | kvm_err("error initializing Hyp mode: %d\n", err); |
1389 | return err; | |
1390 | } | |
1391 | ||
d4e071ce AP |
1392 | static void check_kvm_target_cpu(void *ret) |
1393 | { | |
1394 | *(int *)ret = kvm_target_cpu(); | |
1395 | } | |
1396 | ||
4429fc64 AP |
1397 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) |
1398 | { | |
1399 | struct kvm_vcpu *vcpu; | |
1400 | int i; | |
1401 | ||
1402 | mpidr &= MPIDR_HWID_BITMASK; | |
1403 | kvm_for_each_vcpu(i, vcpu, kvm) { | |
1404 | if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) | |
1405 | return vcpu; | |
1406 | } | |
1407 | return NULL; | |
1408 | } | |
1409 | ||
342cd0ab CD |
1410 | /** |
1411 | * Initialize Hyp-mode and memory mappings on all CPUs. | |
1412 | */ | |
749cf76c CD |
1413 | int kvm_arch_init(void *opaque) |
1414 | { | |
342cd0ab | 1415 | int err; |
d4e071ce | 1416 | int ret, cpu; |
342cd0ab CD |
1417 | |
1418 | if (!is_hyp_mode_available()) { | |
1419 | kvm_err("HYP mode not available\n"); | |
1420 | return -ENODEV; | |
1421 | } | |
1422 | ||
d4e071ce AP |
1423 | for_each_online_cpu(cpu) { |
1424 | smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); | |
1425 | if (ret < 0) { | |
1426 | kvm_err("Error, CPU %d not supported!\n", cpu); | |
1427 | return -ENODEV; | |
1428 | } | |
342cd0ab CD |
1429 | } |
1430 | ||
1e947bad | 1431 | err = init_common_resources(); |
342cd0ab | 1432 | if (err) |
1e947bad | 1433 | return err; |
342cd0ab | 1434 | |
1e947bad MZ |
1435 | if (is_kernel_in_hyp_mode()) |
1436 | err = init_vhe_mode(); | |
1437 | else | |
1438 | err = init_hyp_mode(); | |
1439 | if (err) | |
d157f4a5 | 1440 | goto out_err; |
8146875d | 1441 | |
1e947bad MZ |
1442 | err = init_subsystems(); |
1443 | if (err) | |
1444 | goto out_hyp; | |
1fcf7ce0 | 1445 | |
749cf76c | 1446 | return 0; |
1e947bad MZ |
1447 | |
1448 | out_hyp: | |
1449 | teardown_hyp_mode(); | |
342cd0ab | 1450 | out_err: |
1e947bad | 1451 | teardown_common_resources(); |
342cd0ab | 1452 | return err; |
749cf76c CD |
1453 | } |
1454 | ||
1455 | /* NOP: Compiling as a module not supported */ | |
1456 | void kvm_arch_exit(void) | |
1457 | { | |
210552c1 | 1458 | kvm_perf_teardown(); |
749cf76c CD |
1459 | } |
1460 | ||
1461 | static int arm_init(void) | |
1462 | { | |
1463 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); | |
1464 | return rc; | |
1465 | } | |
1466 | ||
1467 | module_init(arm_init); |